phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('ea737f814bd35840d649e46903b9abae', -1, 1711658778, 1711658778, '36ea8893', 4, 0, 0)

Line : 187
File : sessions.php